From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chunfeng Yun Subject: [PATCH v4, 1/5] dt-bindings: mt8173-xhci: support host side of dual-role mode Date: Wed, 15 Jun 2016 11:07:16 +0800 Message-ID: <1465960040-768-2-git-send-email-chunfeng.yun@mediatek.com> References: <1465960040-768-1-git-send-email-chunfeng.yun@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1465960040-768-1-git-send-email-chunfeng.yun-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+glpam-linux-mediatek=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: Greg Kroah-Hartman , Felipe Balbi , Mathias Nyman , Matthias Brugger Cc: Mark Rutland , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Sergei Shtylyov , Pawel Moll , Ian Campbell , Sascha Hauer , Alan Cooper , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Rob Herring , Alan Stern , Kumar Gala , Chunfeng Yun , linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: devicetree@vger.kernel.org Some resources, such as IPPC register etc, shared with device driver are moved into common glue layer when xHCI driver is the host side of dual-role mode and they should be changed as optional properties if they are required ones before. For clarity, add a new part of binding to support host side of dual-role mode. Additionally add optional properties of pinctrl for host only mode Signed-off-by: Chunfeng Yun Acked-by: Rob Herring --- .../devicetree/bindings/usb/mt8173-xhci.txt | 48 ++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/mt8173-xhci.txt b/Documentation/devicetree/bindings/usb/mt8173-xhci.txt index b3a7ffa..bec2dff 100644 --- a/Documentation/devicetree/bindings/usb/mt8173-xhci.txt +++ b/Documentation/devicetree/bindings/usb/mt8173-xhci.txt @@ -2,6 +2,14 @@ MT8173 xHCI The device node for Mediatek SOC USB3.0 host controller +There are two scenarios: the first one only supports xHCI driver; +the second one supports dual-role mode, and the host is based on xHCI +driver. Take account of backward compatibility, we divide bindings +into two parts. + +1st: only supports xHCI driver +------------------------------------------------------------------------ + Required properties: - compatible : should contain "mediatek,mt8173-xhci" - reg : specifies physical base address and size of the registers, @@ -27,6 +35,9 @@ Optional properties: control register, it depends on "mediatek,wakeup-src". - vbus-supply : reference to the VBUS regulator; - usb3-lpm-capable : supports USB3.0 LPM + - pinctrl-names : a pinctrl state named "default" must be defined + - pinctrl-0 : pin control group + See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt Example: usb30: usb@11270000 { @@ -49,3 +60,40 @@ usb30: usb@11270000 { mediatek,syscon-wakeup = <&pericfg>; mediatek,wakeup-src = <1>; }; + +2nd: dual-role mode with xHCI driver +------------------------------------------------------------------------ + +In the case, xhci is added as subnode to mtu3. An example and the DT binding +details of mtu3 can be found in: +Documentation/devicetree/bindings/usb/mtu3.txt + +Required properties: + - compatible : should contain "mediatek,mt8173-xhci" + - reg : specifies physical base address and size of the registers, + should be only for xHCI IP registers + - interrupts : interrupt used by the host controller + - power-domains : a phandle to USB power domain node to control USB's + mtcmos + - vusb33-supply : regulator of USB avdd3.3v + + - clocks : a list of phandle + clock-specifier pairs, one for each + entry in clock-names + - clock-names : must be + "sys_ck": for clock of xHCI MAC + +Optional properties: + - vbus-supply : reference to the VBUS regulator; + - usb3-lpm-capable : supports USB3.0 LPM + +Example: +usb30: usb@11270000 { + compatible = "mediatek,mt8173-xhci"; + reg = <0 0x11270000 0 0x1000>; + interrupts = ; + power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>; + clocks = <&topckgen CLK_TOP_USB30_SEL>; + clock-names = "sys_ck"; + vusb33-supply = <&mt6397_vusb_reg>; + usb3-lpm-capable; +}; -- 1.7.9.5